Finding the Fourth Proportional to 78,897.02, 118,404.30 and 57,891.33

Step by Step Solution

1. Step 1: Write the proportion equation
   78,897.02 : 118,404.30 = 57,891.33 : x
2. Step 2: Convert to fraction form
   78,897.02/118,404.30 = 57,891.33/x
3. Step 3: Cross multiply
   78,897.02x = 118,404.30 × 57,891.33
4. Step 4: Simplify right side
   78,897.02x = 6,854,582,404.72
5. Step 5: Solve for x
   x = 6,854,582,404.72/78,897.02
6. Step 6: Final answer
   x = 86,880.12